Booster-motor for locomotives



H. L. INGERSOLL.

BOOSTER MOTOR FOR LOCOMOTIVES.

APPLICATION FILED JUNE 6,1919- Patented July 5, 1921;

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Patented July H. L. INGERSOLL.

BOOSTER MOTOR FOR LOCOMOTIVES; APPLICATION FILED JUNE-6, 1919.,

H. L. INGERSOLL.

BOOSTER MOTOR FOR LOCOMOTIVES.

APPLICATION FILED JUNE 6,1919.

Ewe/d0)" flawardjjgemll Patented July 5, 1921. I

' 4 SHEETSSHEET 3 wmy H. L. INGERSOLL.

BOOSTER MOTOR FOR LOCOMOTIVES.

APPLICATION n50 JUNE 6. 1919.

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HOWARD L. INGERSOLL, OF WHITE PLAINS, NEW YORK.

BOOSTER-MOTOR FOR LOCOMOTIVES.

Specification of Letters Patent.

Patented July 5, 1921.

Application filed June 6, 1919. Serial No. 302,321.

' To all whom it may concern."

Be it known that I, HOWARD L. INGERSOLL, a citizen of the United States, residing at lVhite Plains, in the county of Westchester and State of New York, have invented a certain new and useful Improvement in Booster-Motors for Locomotives, of which the following is a full, clear, and exact description, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, forming part of this specification, in which,- a

Figure 1 is a conventional illustration of alocomotive equipped with my improved booster motor.

' Fig. 2 is a detail view of one of the valves used in the booster motor control system.

Fig. 3 is a detail view of another one of the valves used in saidsystem.

Fig. 4: is a diagrammatic view of the booster motor controlling system.

Fig. 5 is a plan view of the booster motor as applied to the trailer truck of a locomotive.

Fig. 6 is a longitudinal sectional view through the booster motor showlng the clutch mechanism, and,

Fig. 7 is a diagrammatic view of the valve reversing mechanism for the booster motor.

This invention relates to a new and useful improvement in booster motors for locomotives relating particularly to the controlling means therefor, the same being an improvement upon the controlling means d1sclosed in a companion application filed by me on May 22, 1919, serially numbered 299,037 Patent No. 1,339,395, granted May 11, 1920.

It is the object of the present invention toinsure the sequential operation of the'clutch mechanism of the booster motor and the opening of the throttle valve to admit steam thereto. This object is attained by the clutch controlling means which blocks ofi the air pressure from the pilot valve for actuating the throttle until the clutch is in its full Operative position, 2'. 6., the gears are in mesh and the booster motor entrained to drive its axle. complished, the air pressure is admitted to the pilot valve in readiness to operate said valve when the throttle of the main locomotive is operated to admit steam through the dry steam pipe to the main cylinders, the

When this operation is ac-- pressure in said dry steam pipe will operate said pilot valve to open connection to the pressure means which operates a throttle valve controlling the steam pressure to the booster motor.

In the drawings, 1 indicates the shell of a locomotive boiler and .2 the steam dome thereof, 3 is the dry steam pipe leading from the steam dome down to the main cylinders 4 of the locomotive. I have conventionally shown the throttle valve 81 which controls the upper end of this dry steam pipe 3, said valve being operated by a rod 82 connected to a throttle lever 83 located in ,the cab of the locomotive, which lever is operable by the engineer at will.

5 are the main driving wheels of the 10- comotive, 6 the pilot truck wheels and 7 the trailer truck wheels, the latter being mounted in journal boxes guided by pedestal jaws in the side frame pieces of atrailer truck frame 8.

9 indicates a bed-plate for the booster motor, preferably in the form of a casting, whose forward end is provided withbear-- ings 10, spread apart as shown in Fig. 5, to embrace the axle 11 on which the trailer truck wheels are mounted.

The booster motor per 86 preferably con sists of a pair of cylinders 13 in which are arranged pistons connected to cross-heads and operating pitmen 15 which are connected to a .crank shaft mounted in bearings on the bed-plate, as disclosed in my companion application. This crank shaft (which is marked 16) carries twin skew gears 17 in mesh with corresponding gears 18, the latter being mounted on rock arms l9pivotally arranged on the crank shaft 16.

20 and 21 are the members of a toggle mechanism connected to the upper ends of the arms 19 and to the bed plate; pintle bolt 22 forms a hinge connection between the links of the toggle, while an eye 23 pivotally connected to said pintle bolt, is attached to a piston rod 24, having a piston 25 arranged at its lower end operating in a cylinder 26. A. spring 27 arranged above the piston tends at all times to depress the piston rod and break the toggle, movin it to the position shown in dotted lines in Fig. 6, wherein the gear 18 is thrown out of mesh with a gear 28 arran ed on the trailer truckaxle 11. A pipe lea in from a source of air pressure supply, to. he hereinafter described, admits pressure under the piston 25 to raise it and.

move the gear 18 into mesh with the gear 28. When this pressure is exhausted, the spring 27 disentrains the gears.

In Fig. 7, I have shown a reversing valve mechanism for the cylinders 13, the same in which the main locomotive is intended to be driven.

Referring now to Fig. 4, 33 indicates the reverse'lever of the locomotive pivoted at 34 and having a dog '(not shown) which cooperates with the teeth on the upper edge of the segment. This reverse lever operates in the usual way to position the valve mechanism for the main cylinders of the locomotive. When the reverse lever is thrown forward, or into the corner (as it is colloquially expressed), it will position the valve mechanism so that the same will be given the full stroke and the main cylinders of the locomotive receive steam throughout substantially their full stroke. This is the usual practice in starting locomotives. When the reverse lever is pulled rearwardly from its central position, the valve mechanism is so positioned that the locomotive will be driven backwardly. After the reverse lever is positioned forwardly or backwardly, as the case may be, then the throttle valve, the lever of which is not. shown, but which is, of course, present in all locomotives, is operated to admit steam to the main cylinders through the dry steam pipe 3. In order to control the throw of the reverse lever, I provide the same with a pin or projection 33 in the path of which are arranged two oppositely disposed dogs 35. These dogs will arrest the reverse lever just one notch short of its full stroke in either direction and normally prevent its operating the booster motor controlling valve. To make the reverse lever double acting, ll connect the dogs 35 by means of a rod 36 arranged on opposite sides of the pivotal points of said dogs. A spring 37 tends to hold the dogs in position, and a foot lever 38 connected by a rod 39 to one of the dogs can be operated so as to simultaneously depress both dogs out of the path of travel of the pin 33 at the will of the engineer, and thus enable the reverse lever to move its full stroke and operate the booster motor controlling valve.

40 indicates an overhanging extension in the form of alever pivoted at 41, having projections lying in the path of movement of the reverse lever so that when said reverse lever is moved to its extreme position in either direction, said lever 40 will be rocked to operate the booster motor controlling valve.

The details of construction of this booster -A spring 48 tends to normally hold valve 47 in position to close the outer seat, and in this position of the valve the inner head of the valve is unseated and an exhaust port 49 thereby opened to a chamber 50. 51 is the pressure chamber of the valve which is connected by means of a pipe 52 to an airpressure reservoir 53. Thus, it may be said that pressure is constantly in the chamber 51, and that the chamber 51 is normally blocked or stopped by the outer head of the valve 47 being seated home.

When, however, the foottreadle 38 is'depressed and the reverse lever 33 moved to either of its extreme positions, the plunger 43 will be moved inwardly to unseat the outer head of the valve 47 and move the inner head of said valve 47 to its seat, thus establishing communication between the pressure chamber 51 and the chamber 50 and the exhaust port 49 is now closed.

We will assume for the purposes of this description that the locomotive is at a standstill and that the reverse lever has been thrown to either of its extreme positions so as to operate the valve 47 thus closing the exhaust 49 and establishing communication between the chambers 51 and 50, as above described.

54 indicates a pipe leading from chamber 50, said pipe being divided into two branches, one, 56, leading to a valve which may begenerally designated as D and the that there is a valve chamber 58 containing two connected valves 59 having cruciform stems and designed to be seated, respectively, in the seats in opposite sides of the chamber 58. There is a spring-pressed plunger 60 arranged in the upper portion of the valve casing which tends to unseat the upper valve and seat the lower valve. This springpressed plunger is opposed by a stronger spring 61 bearing against the underside of a piston 62 having a spring pressed plunger 63 which engages with the underside of the double valve 59 and normally holds the lower one of. said valves from its seat so that communication is normally established between pipe 56 and chamber-58. The purpose of providing a spring-pressed plunger 63 is to enable the piston 62 to have a slightly greater stroke than the'movement of the double valve 59 so that the upper one of the valves will be held yieldingly tolts seat.

Leading from the chamber 58 is a pipe 64 which admits pressure to the underside of the piston 25* to raise it and move the gear 18 into mesh with the gear 28. When this pressure is released the spring 27 disentrams the gears, as before described. After the gears are entrained by the upward movement of piston 25, a port communicating with pipe 65 is opened so that pressure is permitted to pass through pipe 65 to the valve mechanism generally designated as C. When the pressure is initially admitted into pipe 54 before described, it passes into the two branches 56 and 57 referred to, the control of pressure from the pipe 56 having just been described. The pressure from pipe 57 operates to move a valve 66 to establish communication between the port communicating with the pipe 65 and a port 67 in the valve casing. There is a branch port 67 leading to the inner end of the chamber in which the head of valve 66 opcrates, but due to the preponderating pressure on the outer face of the head of the valve, said valve will be moved toward the right, as shown in the drawings, to establish communication between pipe 65 and port 67 as above described. Pressure from port 67 enters a chamber 68 in which is located one head of a double headed valve 69. This double headed valve has its outer head normally held to its seat by means of a spring 70, hence, no pressure in chamber 68 can pass beyond the valve while the same is thus seated.

71 indicates a chamber in the valve casing with which communicates a pipe 7 2 leading to the upper end of the cylinder controlling the throttle operating mechanism, and which chamber, through the pipe 72, is normally exhausted and has communication between chamber 71 and the atmosphere. 73 is a piston normally held retracted by means of a spring 74, said piston carrying a spring pressed plunger 75 in line with the inner head of valve 69.

In the usual operation of locomotives, the reverse lever 33 is first operated to move the valve mechanism in a direction appropriate to drive the engine forwardly or backwardly, as desired, and when this is done the engineer, by placing his foot on the foot lever, will disable the blocking dogs and permit the reverse lever to engage the plunger in the valve mechanism A and admit air pressure into the booster motor controlling system. This pressure, as above described, will be under dual control: first by the piston 25 in the clutch operating mechanism, which is generally. designated as valve B, and which must be operated before the pressure is admitted to the pilot valve C. The

the exhaust from chamber 71 and establish communication between said chamber 71 and chamber 68, whereby air pressure in chamber 68 will pass into the chamber 71 and through pipe 72 tothe chamber abovethe piston 62 forcing the latter downwardly and operating a lever 77 to which it is connected, thereby raising the throttle valve 79 located in the booster motor steam supply pipe 80. The above operative conditions of the booster motor controlling system exist for such period of time as it is desired that the booster motor shall maintain driving relation to its driven axle. In ordinary service conditions, it is preferable to operate the booster motor in connection with the main drivinganechanism of the locomotive from a starting po sition to such time as the main locomotive attains a speed of about twelve miles an hour, when a governing mechanism (not herein shown or described, and which forms no part of the present invention) is brought into lay to automatically shut off the steam supp y from the booster motor.

Another means of cutting off the steam supply fromthe booster motor is when the reverse lever is hooked up, i. e., retrieved a notch or two to shorten the stroke of the valves which controlthe .steam supply to the main cylinders of the locomotive. When the reverse lever is thus hooked up, the plunger in valve mechanism A is released and the air pressure cut off from the pipe 54. Valve mechanism A also, when its plunger is released, opens an exhaust through chamber 50 and the pressure in pipe 54 and its branches 56 and 57 is now exhausted. The first effect of this exhaust is to permit the piston 66 to be moved by pressure through pipe 65 and ports 67, 67 over to close the port 67 and shut offpressure above the throttle operating cylinder 62, which,

'rising, will force the pressure above it back through pipe 72, chamber 71, ports 67 and 67 to hold the valve 66 in its exhausting position. The double headed valve 69 during this operation is held by the piston 73 so that its inner head closes the exhaust from chamber 71, but maintains communication between chambers 71 and 68.

When the piston 62 rises, it will come in contact with the lower solid end of valve 59 raising it so as to open communication between the chamber below the piston 25, through pipe 64, chamber 58 and pipe 56 to the exhaust chamber in valve A. Spring 27 will force piston 25 downwardly releasing the clutch and shutting off pipe 65.

In order to utilize direct pressure from the reservoir in sustaining the piston 25 in its raised position, I provide a pipe 85 extending from the main reservoir to a chamber 86 located above the upper head of valve 59 so that when piston 62 is in its lower position and the upper head of valve 59 is unseated, the pressure from pipe 85 will pass through chamber 58 and pipe 64 to the chamber under the piston 25. This direct connection is, of course, closed when the valve 59 is raised, as shown by full lines in Fig. 3.

Summary of operation: To start the-locomotive in the forward direction the engineer moves the reverse lever 33 to the extreme. forward position (to the right Fig. 4) pressing down treadle 88 with his foot to allow the reverse lever to actuate valve device A. He then opens the main throttle valve of the locomotive as usual and the booster is entrained with the axle it is designed to drive and is supplied with steam. This results from the following movements of the parts constitutingthe booster control mechanism: Valve 46 of the device A is moved by the reverse lever to put pipe 52 in communication with pipe 54. The compressed air in pipe 54 passes through branch 56 and into pipe 64 (valve 59 being raised by piston 62) and through the pipe into the cylinder 26 of the booster entraining motor B, the piston 25 of which is raised to mesh idler gear 18 with the gear 28 on the locomotive axle (Fig. 6). At the same time asair is passing to the entraining motor, as just described, it also flows from pipe 54 through branch pipe 57 to the booster throttle controller C and moves piston 66 from' the position shown in Fig. 4 to that shown in Fig. 2. The controller, however, cannot act to supply the booster throttle valve motor with air until (1) the entrainment of the booster is completed, and (2) the main driving means of the locomotive is under steam. When piston 25 of the entraining motor B uncovers the inlet of pipe air will pass to the controller C and through port 67 thereof to chamber 68, piston valve 66' having been moved to put pipe 65 in communication with port 67. The air is blocked in chamber 68 by valve 69 but this valve is moved to put chamber 68 in communication with pipe 72. As soon as steam is admitted to dry pipe 3 by the opening of the main throttle 81, the steam from the dry pipe 3 passing through pipe 76 and moving piston 73 against valve 69, air will pass through pipe 72 to the booster throttle motor D and the booster will be supplied with steam. It will have been observed that when motor D is operated valve 59 being no longer supported by piston 62, will move downwardly shutting off the air from pipe 56. This movement of the valve, however, puts pipe 85 leading from tank 53 in communication with pipe 64 so that theposition of the fluid pressure operated parts of the control mechanism remains unchanged.

The booster is put out of operation either (1) when the engineer hooks up his reverse lever to shorten valve movement of the main engine (which under ordinary conditions he will do when the locomotive attains a speed of about tenor twelve miles an hour) or (2) when he closes the main throttle. In the first case, the operation of the booster control mechanism is such that steam is first cut off from the booster and thereafter the booster is disentrained from its axle. In other words, the starting sequence is reversed. In the second case steam is cut off from the booster but the booster is not disentrained from the axle. Assume, now, that the reverse lever is hooked up. Valve 46 will return to the position shown in Fig. 4,

. cutting off pipe '54 frompipe 52. Air pressure against piston 66 will exhaust through port 49 ofvthe device A and pressure from pipe 65 against the other side of the piston (through port 67) will move the plston to the left- (Figs. 2 and 4) cutting off the air through pipe 72 to the throttle motor D.

\Vhen valve 46 is in this position it provides a vent to the atmosphere for the pressure in motor D and pipe 72. Steam is now out off from the booster but until this happens the booster remains entrained with the locomotive axle because the entraining motor is under pressure from the air line 85, 64. As soon. however, as the booster throttle motor piston rises to lift valve 59 the air line is cut between pipe 85 and 64, and an exhaust for motor D is provided through pipes 64,

54 and port 49 of the device A.

If however the engineer closes his main throttle without hooking up the reverse lever, the steam is cut ofi from the booster but no disentrainment of the booster takes place unless the reverse lever is also hooked up. When main ,throttle 81 is closed the pressure in dry pipe 3 will be reduced, piston 73 will move to the right and valve 69 will block the air pressure from pipe 65 to pipe 72 and the motor D will exhaust past valve 69. As a consequence of the upward movement of piston 62 valve 59 is raised, cutting air line 85, 64, but as air may now pass from pipes 54 and 56 into chamber 58 and pipe 64 piston 25 will remain in its elevated position so that the booster will not be disentrained from the axle 11. Under these conditions it is unnecessary to disengage the driving connection between the booster and locomotive.

What I claim is:

1. In controlling apparatus for a locomo- .and' means operated by said controlling mechanism for insuring sequential control of said clutch and said energy.

3. In combination with a booster motor for locomotives, a controlling mechanism therefor, means for supplying energy to the booster motor, and means operated by said controlling mechanism for first insuring the movement of the clutch into position and then supplying energy to said motor when the locomotive is starting or running at a low s eed.

4. n combination with a controlling mechanism for locomotives, a booster motor, means for supplying energy thereto, a clutch, means operated by said controlling mechanism of the main locomotive for first cutting off the ener from the motor and then disengaging said clutch.

5. The combination with the main driving means of a locomotive and its controlling devices, of a booster motor and mechanism for operatively connecting the booster motor with the locomotive, mechanism for setting the booster motor in operation, and means, the actuation of which is conditioned upon the position of the controlling devices of the main driving means whereby the aforesaid two mechanisms are operable only in se uence.

6. n a controlling mechanism for booster motors for locomotives, the combination of the controlling mechanism of the locomotive, including a moving part, a booster motor, a clutch and throttle valve for said booster motor, and means operated by said moving part for sequentially controlling said throttle valve and clutch.

7 In a controlling mechanism for booster motors for locomotives, the combination of the controlling mechanism of the locomotive, a booster motor, a steam supply therefor, an air pressure system in control of said booster motor, a clutch mechanism for entraining the booster motor with the axle to be driven, a pressure operated piston for controlling said clutch, means for initially admitting pressure to operate said piston, and means controlled by the piston or establishin direct connection between the source of air pressure supply to the chamber under the piston when the piston approaches the limit of its entraining movement.

8. In a controlling mechanism for booster motors for locomotives, the combination of the controlling mechanism of the locomotive, a booster motor, a steam supply therefor, an air pressure system in control of said booster motor includinga clutch mechanism, a throttle valve, a pressure operated piston in said system for actuating said throttle valve, saidpiston also operatmg a valve for controlling the supply of pressure to the clutch mechanism.

9. In a controlling mechanism for booster motors for locomotives, the combination of the controlling mechanism of the locomotive, a booster motor, a steam supply therefor, an air pressure system in control of said booster motor, said system including a pressure operated clutch mechanism, a pressure operated throttle valve for controlling the steam supply to the booster motor, the operationof the latter controlling the movement of the former, a pilot valve in control of said throttle valve mechanism, and means operated from the steam suppl to the main cylinders of the locomotive or operating said pilot valve. p

10. In a controlling mechanism for booster motors for locomotives, the combination of the controlling mechanism of the locomotive, a booster motor, a steam supply there-' for, an air pressure system in control of said booster motor, said system including-a pressure operated piston for admitting and shutting off steam to the booster motor, a pilot valve in control of said piston for admitting pressure to one side thereof to open said throttle valve, and means for exhausting pressure from said pilot valve whereby the operating pressure of the throttle valve controlling piston is utilized to move said pilot valve to a position where it will exhaust the pressure from the throttle valve operating piston thereby permitting said throttle valve to close. 7

11. In combination with the main driving means of a locomotive and its controlling devices, a booster motor, means for entraining the booster motor with the locomotive, and means for setting the booster motor in operation which is lncapable of actuation until the entraining of the booster with the locomotive has taken place.

12. In combination with the main drivingmeans of a locomotive and its controlling devices, a booster motor, means for entraining the booster motor with the locomotive, and means for setting the booster motor in operation, the actuation of which is conditioned upon the main driving means being .set in operation and upon the complete entrainmentof the booster with the locomo tive.

13. In combination with the main driving means of a locomotive and its throttle valve and reverse lever, a booster motor, means for entraining the booster. motor with the locomotive, and means for setting the booster motor in operation, the actuation of which is conditioned upon said reverse lever being in full starting position, the throttle valve open, and said entraining means having completed the entrainment of the booster with the locomotive. v

14. In a controlling mechanism for booster motors for locomotives, the combination of a booster motor, and means for initially entraining said booster motor'so that it is'in condition to become a driving factor, means for admitting energy to said booster motor, causing it to become an effective driving factor, and means for insuring the sequential operation of said means. 15. In combination with the main driving means of a locomotive, a booster motor to aid the main driving mechanism in starting the locomotive and for propelling the same at low speeds, mechanism for operatively connecting said booster motor with and disconnecting it from the locomotive, mechanism for supplying the booster motor with motive power, and controlling. means for the aforesaid mechanisms whereby, when the booster is put into operation, it is first operatively connected with the locomotive and thereafter supplied with motive power and when it is put out of operation the motive power is first cut off from the motor and the motor thereafter disengaged from the locomotive.

16. In combination with the main driving means of a steam propelled locomotive, a steam actuated booster motor to aid the main driving means in starting the locomotive and propelling the same at low speeds, mechanism for operatively connecting the booster motor with and disconnecting it from the locomotive, mechanism for supplying the booster motor with steam, and controlling means for the aforesaid mechanisms whereby when the booster is put into operation, it is first operatively connected with the locomotive and thereafter supplied with steam and when it is put out of operation steam is cut off therefrom and the motor thereafter disconnected from the locomotive.

17 In combination with the main driving means of a steam propelled locomotive, a booster motor to aid the main driving means in starting the locomotive and propelling the same at low speeds, a trainof gears for operatively connecting the booster motor with an axle of the locomotive, two of which gears are disengageable from each other, mechanism for meshin and disengaging said gears, mechanism or supplying the booster motor with motive power, and controlling means for the aforesaid mechanisms whereby, when the booster is put into operation, it is first entrained with the locomotive axle and thereafter supplied with --eration the motive power is first cut and when it is put out of opf o therefrom and the motor thereafter disentrained from the locomotive axle.

18. In combination with the main driving means of a steam propelled locomotive, a booster motor to aid the main driving means in starting the locomotive and propelling the same at low speeds, a fluid pressure operated mechanism for operatively connecting said booster motor with and disconnecting it from the locomotive, a fluid pressure operated mechanism for supplying the booster motor with motive power, and controlling means for admitting and excludin fluid pressure to and from the aforesai mechanisms whereby, when the booster is put into operation, it is first operatively connected with the locomotive and thereafter supplied with motive power, and when it is put out of operation the motive power is first cut off therefrom and the motor thereafter disengaged from the locomotive.

19. In combination with the main driving means of a steam propelled locomotive and its controlling devices, a booster motor'to aid the main driving means in starting the locomotive and propelling the same at low speeds, mechanism for operatively connecting said booster motor with and disconnecting it from the locomotive, mechanism for supplying the booster motor with motive power, and controlling means for said mechanisms, the operation of which is dependent upon theposition of the controlling devices of the main driving means of the locomotive and which is constructed so that when the booster is put into operation it is first operatively connected with the locomotive and D thereafter supplied with motive power and when it is put out of operation the motive power is first cut off therefrom and the motor thereafter disconnected from the loco-- motive.

20. In combinationwith the main driving 110 means of a steam propelled locomotive, a booster motor to aidthe main driving means in starting the locomotiveand propelling the same at low speeds, a fluid pressure device for controlling the operative engagement of the booster motor with the locomotive, a fluid ressure device for controlling the applic'atlon of motive power to the booster motor which is actuated, in setting the booster motor in action, after the first mentioned device has completed its operation, whereby the power is notapplied to the booster motor until it has been fully engaged with the locomotive.

21. In,combination with the main driving 125 means of a steam propelled locomotive, a booster motor to aid the main driving means in starting the locomotive and propelling the same at low speeds, a fluid pressure device for controlling the operative engagement of 130 motive power,

aseaese the booster motor with the locomotive, a fluid pressure device for controlling the ap plication of motive power to the booster motor, said last named fluid device being actuated and its operation completed, when the booster motor is to be put out of action before the first named fluid pressure device is actuated.

22. In combination with the main driving means of a steam propelled locomotive, a booster motor to aid the main driving means in starting the locomotive and propelling the same at low speeds, a device for controlling the operative engagement of the booster motor with the locomotive, a device for controlling the application of motive power to the booster motor which is actuated, in setting the booster motor in action after the first mentioned device has completed its operation, whereby the power is not applied to the booster motor until it has been fully engaged with the locomotive.

23. In combination with the main driving means of a steam propelled locomotive, a booster motor to aid the main driving means in starting the locomotive and propelling the same at low. speeds, a device for controlling the operative engagement of the booster motor with the locomotive, a device for controlling the application of motive power tothe booster motor, said last nameddevice being actuated and its operation completed,

when the booster motor is to be put out of action before the first named device is actuated.

24. In combination with the main driving means for said fluid pressure devices actu-.

ated by movements of said reverse lever and adapted to control the application of pressure to said fluid pressure devices so that in putting the booster motor in operation it is first completely connected to the locomotive and thereafter supplied with steam and in putting the booster motor out of action steam is first cut off therefrom and there after the motor disconnected from the locomotive.

25. In combination with the main driving means of a steam propelled locomotive and its throttle valve and reverse lever, a booster motor to aid the main driving means .in starting the locomotive and propelling it at low speeds, a fluid pressure device for governing the admission of steamto the booster, a fluid pressuredevice foroperatively connecting the booster-{motor with and disconnecting it from the locomotive, controllin means for said fluid pressure devices actu ated by movements of the reverse lever and adapted to control the supply of pressure to the fluid pressure devices so that in putting the'booster-motor in action the motor is first fully connected to the locomotive and thereafter steam admitted thereto and in putting the same out of action steam is first cut off from the motor and the motor thereafter disconnected from the locomotive, and a device actuated by steam pressure from the 1000-1 motive boiler when the throttle of the main driving means is open upon the actuation of which the admission of steam to the booster motor is dependent.

26. In combination with the main driving means of a steam propelled locomotive and its reverse lever and throttle valve, a steam operated booster motor to aid the main driving means in starting the locomotive and propelling the same at low speeds, a compressed air device for operatively connecting the booster motor with and disconnecting it from the locomotive, a throttle valve for the booster motor, compressed air devices ---for controlling the operation of the aforesaid mechanism and throttle valve, a steam actuated device, which receives steam when the throttle of the main driving means is open, the actuation of which conditions the opening of the booster motor throttle, a valve operated by the reverse lever for governing .the admission of air pressure to said compressed air devices, and additional means for governing the admission of air pressure to said devices whereby, when the booster is put into action, it is first fully engaged with the locomotive and "thereafter steam supplied thereto, and when it is put out of action steam is first cut ofl' therefrom and; the motor thereafter disconnected from the locomotive. v

27. In combination with the main driving means of a steam propelled locomotive and its reverse lever and throttle valve, asteam operated booster motor .to aid the main driving means in starting the locomotive and propelling the same at low. speeds,

-mechanism for operatively connecting the booster motor with and disconnecting it from the locomotive, a source of supply of pressed piston for controlling said mechanism, a cylinder and spring pressed piston.

compressed air, a cylinder and sprmg I the first named cylinder into the second named cylinder after the piston in the first named cylinder has com leted its stroke under pressure of air, sai means comprising two valves, a-steam actuated device adapted to receive steam when .the throttle of the main driving means is open for controlling one of said valves,,the other of said valves being moved in one direction by air pressure passing through the valve controlled by the reverse lever, and in the other direction by the air passing from the first mentioned cylinder to the second mentioried cylinder. 28. lln combination with the main driving means or a locomotive, a booster motor, means for entraining the booster motor with the locomotive comprising a cylinder and a piston, one or which elements is moved by fluid pressure, and fluid pressure actuated mechanism for setting the booster motor in operation connected with said entraining means so that it receives. fluid pressure therefrom but only after the movable element of the entraining means has substantially completed its entraining stroke.

29. ln combination with the main driving means of a locomotive, a booster motor, means for entraining the booster motor with the locomotive comprising a cylinder and a piston, one of which-elements is moved by fluid pressure, a fluid pressure operated device for setting said booster motor in operatioma fluid pressure supply pipe leading to said entraining means to introduce fluid pressure to the same, anda pipe leading from the same to the device for setting the booster-in operation, which is uncovered to receive pressure fluid when the movable element of the 'entraining means has been moved by said fluid pressure to the end or its travel, I

30. In combination with the main driving means or a locomotive and its reverse lever, a booster motor, means for entraining the booster motor with the locomotive comprising a cylinder and a ipiston, one or which elements is moved by uid pressure, a fluid pressure operated device for setting said booster motor in operation, a-iflnid pressure supply pipe leading to said entraining means to introduce fluid pressure to the same, a pipe leading from the same to the device for setting the booster in operation which is uncovered to receive pressure fluid when the movable element or the entraining means has been moved by said fluid pressure to the end or its travel, and a valve to block the flow or pressure fluid throu h the first named pipe which is opened w en the reverse lever is put into an extreme position. 31. lln'combination with the main driving means ot'a locomotive and its reverse lever, a booster motor, means for entraining the booster motor with the locomotive comprisa cylinder and a piston, one or which elements is moved by fluid pressure, a fluid pressure operated device for setting said booster motor in operation, a fluid pressure supply pipe leading to said entraining means to introduce fluid pressure to the same, a

verse lever is put into an extreme position,

a valve to block the flower pressure fluid through the second named pipe, and means actuated when the main drivingmean's is set in operation for opening said last named valve.

32. in combination with the main driving means of a steam propelled locomotive and its throttle valve and reverse lever, a booster motor for aiding the main driving means in starting the locomotive and propelling it at low speeds, and controlling mechanism for the booster which operates when the reverse lever is in starting position and the main throttle valve open, to first entrain the booster with the locomotive and thereafter set the same in operation, and which oper'ates, when either the throttle valve is closed or the reverse lever moved from starting position, to put the booster out of operation,

tl-lln combination with the main driving means of a steam propelled locomotive and its throttle valve and reverse lever, a booster motor for aiding the main driving means in starting the locomotive and propelling it at low speeds, and controlling mechanism for the booster which operates when the reverse lever is in starting position and the main throttle valve open, to first entrain. the booster with the locomotive and thereafter set the same in operation, and which opcrates, when either,- throttle valve is closed or the reverse lever moved ilrom starting position, to put the booster out of operation and when the reverse lever is so moved to thereafter disentrain the booster from the locomotive.

3%. ln combination with the main driving means of a steam propelled locomotive and its reverse lever and throttle valve, a booster motor for aiding the main driving means in starting the locomotive and propelling the same at low speeds, a fluid pressure actuated device for entraining the booster motor with the locomotive, a fluid pressure actuated device lor controlling the operation or the booster, said devices arranged to be actuated in sequence to entrain the booster and then set the same in operation and to put the booster out or o oration and then disentrain the same, a va ve operated by the reverse lever for shutting ofi pressure fluid to both said devices, and a valve controlled through the movements of said throttle valve for shutting oil? pressure fluid onl to the device controlling the operation of t e booster.

35. In combination with the main driving means of a steam propelled locomotive and a booster motor to a1d the main driving means in starting the locomotive and propelling the same at low speeds, means conditioned on the main driving means being in operation for first entraining the booster motor with the locomotive and then setting the same in operation, and means whereby the booster is put out of operation but not disentrained from the locomotive when steam is shut off from the main driving means.

36. In combination with the main driving means of a steam propelled locomotive and its reverse lever and throttle valve, a booster motor to aid the main driving 'means in starting the locomotive and propelling the same at low speeds, and mechanism which operates: to first entrain the booster motor withthe locomotive and then set the same in operation when thereverse lever is in starting position and the throttle valve open; to first put the booster motor out of operation and then disentrain the same when the reverse lever is moved from such position; and to put the booster motor out of operation without disentraining the same when said throttle valve is closed without changing the position of the reverse lever.

In testimony whereof I hereunto aflix my signature this 31st day of May, 1919.

HOWARD L. INGERSOLL. 

